Contents
1.2.1 MAJOR ACTIVITIES UNDERTAKEN
ANNEX B Project Organisation Chart and
Contact Detail
List of Tables
Table 1.1 Summary of Activities Undertaken in the Reporting Period
Table 2.1 Hourly Average of Parameters Recorded for CAPCS
Table 2.2 Hourly Average of Parameters Recorded for CHP 1
Table 2.3 Hourly Average of Parameters Recorded for CHP 2
Table 2.4 Hourly Average of Parameters Recorded for CHP 3
Table 2.5 Hourly Average of Parameters Recorded for ASP
Table 2.6 Hourly Average of Parameters Recorded for the Standby Flaring Gas Unit
Table 2.7 Quantities of Waste Generated from the Operation of the Project
The construction works of No. EP/SP/61/10 Organic Resources Recovery Centre Phase 1 (the Project) commenced on 21 May 2015. This is the 39th Quarterly Environmental Monitoring and Audit (EM&A) report presenting the EM&A works carried out during the period from 1 December 2024 to 28 February 2025 in accordance with the EM&A Manual.
Non-compliance of emission limits of Dust and Total Odour from CAPCS; NOx and SO2 from CHP1; NOx from CHP2; NOx and HCl from CHP3; and NOx, SO2, and NH3 from the ASP were recorded during December 2024.
Non-compliance of emission limits of Total Odour from CAPCS; NOx and HCl from CHP1; NOx and SO2 from CHP2; NOx from CHP3; and NOx, SO2, NH3, and HCl from the ASP; and HF from the Standby Gas Flaring Unit were recorded during January 2025.
Non-compliance of emission limits of Total Odour from CAPCS; NOx from CHP1; NOx from CHP2; NOx from CHP3; CO, NOx, SO2, NH3, and HCl from the ASP were recorded during February 2025.
Exceedances occurred due to system instability, incorrect sensor readings and start-up issues.
Exceedances for the air emission limits for the CAPCS, CHP, ASP stacks, and Standby Gas Flaring Unit were recorded during the reporting period.
No complaint was received during the reporting period.
The Organic Resources Recovery Centre (ORRC) Phase I development (hereinafter referred to as “the Project”) is to design, construct and operate a biological treatment facility with a capacity of about 200 tonnes per day and convert source-separated organic waste from commercial and industrial sectors (mostly food waste) into compost and biogas.
ERM-Hong Kong, Ltd (ERM) has been appointed by OSCAR as the Environmental Team (ET) for the construction phase EM&A programme and the Monitoring Team (MT) for the operation phase EM&A programme for the implementation of the EM&A programme in accordance with the requirements of the EP and the approved EM&A Manual.
The Project Site is located at Siu Ho Wan in North Lantau with an area of about 2 hectares. The facility received an average of 140.38 to 153.95 tonnes and treated an average of 99.5 to 113.48 tonnes of source separated organic waste per day during the reporting period.
A summary of the major activities undertaken in the reporting period is shown in Table 1.1.
Table 1.1 Summary of Activities Undertaken in the Reporting Period
|
Activities Undertaken in the Reporting Period |
|
· Operation of the Project, including organic waste reception, and operation of the pre treatment facilities, anaerobic digesters, composting facilities, air pollution control systems, on-line emission monitoring system for the Centralised Air Pollution Control Unit (CAPCS), Co-generation Units (CHP)s and Ammonia Stripping Plant (ASP), and the wastewater treatment plant; and · Cleaning of the ASP. |
The concentrations of concerned air pollutants emitted from the stacks of the CAPCS, CHP, ASP and Standby Flaring Gas Unit during the reporting period are monitored on-line by the continuous environmental monitoring system (CEMS). The number of exceedances of the concerned air emissions monitored for the CAPCS, CHP, ASP and Standby Flaring Gas Unit during this reporting period are presented in Tables 2.1 to 2.6.
It should be noted that measurements recorded under abnormal operating conditions, e.g., start up and stopping of stacks and unstable operation, as well as test runs and interference of sensor, are disregarded.
Table 2.1 Hourly Average of Parameters Recorded for CAPCS
|
Parameter |
Range of Hourly Average Conc. (mg/Nm3) |
Emission Limit (mg/Nm3) |
Exceedance Identified |
Remarks |
|
VOCs (including methane) (a) |
0 – 202
|
680 |
Nil |
System unstable (e.g., low efficiency) |
|
Dust (or TSP) |
0 – 491 |
6 |
Identified (c) |
System unstable (e.g., low efficiency) |
|
Odour (including NH3 & H2S) (b) |
0 – 2,056 |
220 |
Identified (d) |
System unstable (e.g., low efficiency) |
|
Notes: (a) The VOCs emission limit includes methane as biogas is adopted, as fuel in the combustion process. (b) The odour unit is OU/Nm3. (c) Dates with Dust exceedances (number of exceedances on that day) were identified on 2(12) and 17(2) December 2024. (d) Dates with Odour exceedances (number of exceedances on that day) were identified on 1(24), 2(19), 3(24), 4(24), 5(24), 6(4), 7(5), 8(7), 9(6), 10(7), 11(13), 12(16), 13(13), 14(3), 15(13), 16(16), 17(13), 18(13), 19(7), 20(1), 21(4), 23(2), 24(4), 26(6), 27(3), and 31(13) December 2024; 1(2), 2(11), 3(9), 4(4), 6(2), and 7(2) January 2025; and 17(5) February 2025. |
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Table 2.2 Hourly Average of Parameters Recorded for CHP 1
|
Parameter |
Range of Hourly Average Conc. (mg/Nm3) (a) |
Max. Emission Limit (mg/Nm3) |
Exceedance Identified |
Remarks |
|
Dust (or TSP) |
0 - 14 |
15 |
Nil |
Nil |
|
Carbon Monoxide |
0 - 648 |
650 |
Nil |
Nil |
|
NOx |
0 – 587 |
300 |
Identified (c) |
System unstable (e.g., low efficiency) |
|
SO2 |
0 – 67 |
50 |
Identified (d) |
System unstable (e.g., low efficiency) |
|
VOCs (including methane) (b) |
0 – 686 |
1,500 |
Nil |
Nil |
|
HCl |
0 - 24 |
10 |
Identified (e) |
System unstable (e.g., low efficiency) |
|
HF |
0 - 1 |
1 |
Nil |
Nil |
|
Notes: (a) All values refer to an oxygen content in the exhaust gas of 6% and dry basis. (b) The VOCs emission limit includes methane as biogas is adopted as fuel in the combustion process. (c) Dates with NOx exceedances (number of exceedances on that day) were identified on 1(24), 2(24), 3(24), 4(19), 5(5), 6(2), 10(2), 11(5), 12(14), 13(24), 14(24), 15(24), 16(16), 17(24), 18(24), 19(24), 20(24), 21(24), 22(24), 23(24), 24(24), 25(11), 28(2), 30(2), and 31(1) December 2024; 1(5), 3(3), 4(7), 5(1), 6(2), 7(13), 8(14), 9(20), 12(2), 14(13), 15(17), 21(14), 22(2), 25(9), 26(22), 28(12) and 29(12) January 2025; and 7(1), 14(3), 17(1), 25(13), 26(10) and 28(1) February 2025 . (d) Dates with SO2 exceedances (number of exceedances on that day) were identified on 12(2), 13(2), 14(13), 15(4), 16(7), and 17(3) December 2024. (e) Date with HCl exceedance (number of exceedance on that day) was identified on 1(1) January 2025. |
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Table 2.3 Hourly Average of Parameters Recorded for CHP 2
|
Parameter |
Range of Hourly Average Conc. (mg/Nm3) (a) |
Max. Emission Limit (mg/Nm3) |
Exceedance Identified |
Remarks |
|
Dust (or TSP) |
0 – 15 |
15 |
Nil |
Nil |
|
Carbon Monoxide |
0 – 649 |
650 |
Nil |
Nil |
|
NOx |
0 – 494 |
300 |
Identified (c) |
System unstable (e.g., low efficiency) |
|
SO2 |
0 – 51 |
50 |
Identified (d) |
System unstable (e.g., low efficiency) |
|
VOCs (including methane) (b) |
0 – 1,145 |
1,500 |
Nil |
Nil |
|
HCl |
0 – 9 |
10 |
Nil |
Nil |
|
HF |
0 – 1 |
1 |
Nil |
Nil |
|
Notes: (a) All values refer to an oxygen content in the exhaust gas of 6% and dry basis. (b) The VOCs emission limit includes methane as biogas is adopted as fuel in the combustion process. (c) Dates with NOx exceedances (number of exceedances on the day) were identified on 5(3), 6(5), 8(4), 9(16), 10(16), 11(14), and 13(14) December 2024; 6(1), 7(6), 8(12), 9(14), 10(11), 11(24), 12(13), 13(4), 14(10), 15(20), 16(24), 17(21), 19(13), 20(7), 21(1), 22(8), 27(5), 28(1), 29(2) and 31(8) January 2025; and 8(3), 10(6), 11(11), 15(1), 20(10), 21(7) and 22(1) February 2025. (d) Date with SO2 exceedance (number of exceedance on that day) was identified on 17(1) January 2025. |
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Table 2.4 Hourly Average of Parameters Recorded for CHP 3
|
Parameter |
Range of Hourly Average Conc. (mg/Nm3) (a) |
Max. Emission Limit (mg/Nm3) |
Exceedances Identified |
Remarks |
|
Dust (or TSP) |
0 – 5 |
15 |
Nil |
Nil |
|
Carbon Monoxide |
0 – 127 |
650 |
Nil |
Nil |
|
NOx |
0 – 605 |
300 |
Identified (c) |
System unstable (e.g., low efficiency) |
|
SO2 |
0 – 37 |
50 |
Nil |
Nil |
|
VOCs (including methane) (b) |
0 – 1,113 |
1,500 |
Nil |
Nil |
|
HCl |
0 – 41 |
10 |
Identified (e) |
System unstable (e.g., low efficiency) |
|
HF |
0 – 1 |
1 |
Nil |
Nil |
|
Notes: (a) All values refer to an oxygen content in the exhaust gas of 6% and dry basis. (b) The VOCs emission limit includes methane as biogas is adopted as fuel in the combustion process. (c) Dates with NOx exceedances (number of exceedances on the day) were identified on 1(3), 2(2), 3(1), 4(2), 5(7), 6(14), 7(7), 8(7), 10(2), 11(6), 12(5), 16(12), 17(1), 18(4), 19(7), 20(14), 21(5), 23(3), 24(3), 26(2), 27(11), 28(1), 29(9), 30(4), and 31(4) December 2024; 1(10), 2(15), 3(7), 4(15), 5(3), 6(1), 7(6), 10(13), 11(7), 12(22), 13(16), 14(6), 15(1), 16(4), 17(10), 18(4), 20(10), 21(7), 23(2), 24(9), 25(2), 26(13), 27(10), 28(2), 29(7), 30(1) and 31(9) January 2025; and 1(8), 4(4), 5(3), 8(1), 12(5), 13(11), 14(3), 16(2), 19(2), 20(4), 22(5), 23(9) and 24(3) February 2025. (d) Date with HCl exceedance (number of exceedance on that day) was identified on 23(1) December 2024. |
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Table 2.5 Hourly Average of Parameters Recorded for ASP
|
Parameter |
Range of Hourly Average Conc. (mg/Nm3) (a) |
Max. Emission Limit (mg/Nm3) |
Exceedances Identified |
Remarks |
|
Dust (or TSP) |
0 – 5 |
5 |
Nil |
Nil |
|
Carbon Monoxide |
0 – 207 |
100 |
Identified (c) |
Incorrect sensor(s) reading |
|
NOx |
0 – 2,773 |
200 |
Identified (d) |
System unstable (e.g., low efficiency) |
|
SO2 |
0 – 233 |
50 |
Identified (e) |
System unstable (e.g., low efficiency) |
|
VOCs (including methane) (b) |
0 – 20 |
20 |
Nil |
Nil |
|
NH3 |
0 – 353 |
35 |
Identified (f) |
System unstable (e.g., low efficiency) |
|
HCl |
0 – 15 |
10 |
Identified (g) |
System unstable (e.g., low efficiency) |
|
HF |
0 – 1 |
1 |
Nil |
Nil |
|
Notes: (a) All values refer to an oxygen content in the exhaust gas of 11% and dry basis. (b) The VOCs emission limit include methane as biogas is adopted as fuel in the combustion process. (c) Date with Carbon Monoxide exceedance (number of exceedance on the day) was identified on 28(1) February 2025. (d) Dates with NOx exceedances (number of exceedances on the day) were identified on 1(23), 2(23), 3(22), 4(23), 5(20), 6(24), 7(20), 8(24), 9(9), 10(17), 11(23), 12(23), 13(21), 14(20), 15(24), 16(22), 17(23), 18(23), 19(24), 20(17), 21(18), 22(17), 23(18), 24(24), 25(24), 26(23), 27(6), 28(20), 29(23), 30(11), and 31(16) December 2024; 1(18), 2(12), 3(24), 4(18), 5(19), 6(18), 7(12), 8(16), 9(21), 10(19), 11(23), 12(15), 13(19), 14(20), 15(20), 16(21), 17(23), 18(8), 19(13), 20(24), 21(9), 22(12), 23(2), 24(13), 25(24), 26(21), 27(20), 28(10) January 2025; and 1(17), 2(21), 3(13), 4(16), 5(20), 6(24), 7(20), 8(24), 9(24), 10(24), 11(21), 12(24), 13(24), 14(18), 15(4), 16(11), 17(15), 18(19), 19(20), 20(5), 21(14), 22(21), 23(18), 24(20), 25(10), 26(8), 27(15) and 28(10) February 2025. (e) Dates with SO2 exceedances (number of exceedances on the day) were identified on 1(24), 2(22), 3(18), 4(21), 5(21), 6(24), 7(23), 8(24), 9(9), 10(17), 11(22), 12(23), 13(21), 14(22), 15(24), 16(22), 17(23), 18(17), and 19(10) December 2024; 1(1), 6(1), 10(2), 11(5), 12(1), 13(4), 15(4), 16(21), 17(22), 18(8), 19(13), 20(6) and 26(1) January 2025; and 5(1), 21(1) 23(1), and 24(1) February 2025. (f) Dates with NH3 exceedances (number of exceedances on the day) were identified on 1(5), 2(7), 3(7), 4(9), 5(3), 6(2), 7(2), 8(6), 9(3), 10(9), 11(12), 12(3), 13(2), 14(5), 15(1), 16(2), 18(10), 20(4), 21(12), 22(9), 23(6), 24(3), 26(4), 27(3), 28(5), 29(3), and 31(2) December 2024; 1(2), 5(9), 6(11), 7(2), 9(5), 10(9), 11(8), 12(2), 13(6), 14(1), 16(2), 17(1), 18(2), 20(4), 21(1), 22(1), 23(2), 24(6) and 26(6) January 2025; and 1(5), 2(2), 3(1), 4(3), 5(1), 15(1), 19(1), 21(6), 22(16), 23(11), 24(3), 25(1), 26(2), 27(5) and 28(4) February 2025. (g) Dates with HCl exceedances (number of exceedance on the day) were identified on 26(1) January 2025 and 24(1) February 2025. |
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Table 2.6 Hourly Average of Parameters Recorded for the Standby Flaring Gas Unit
|
Parameter |
Range of Hourly Average Conc. (mg/Nm3) (a) |
Max. Emission Limit (mg/Nm3) |
Exceedances Identified |
Remarks |
|
Dust (or TSP) |
0 – 0 |
5 |
Nil |
Nil |
|
Carbon Monoxide |
0 – 9 |
100 |
Nil |
Nil |
|
NOx |
0 – 1 |
200 |
Nil |
Nil |
|
SO2 |
0 – 2 |
50 |
Nil |
Nil |
|
VOCs (including methane) (b) |
0 – 19 |
20 |
Nil |
Nil |
|
HCl |
0 – 0 |
10 |
Nil |
Nil |
|
HF |
0 – 3 |
1 |
Identified (c) |
Start-up issues (not at working temperature) |
|
Notes: (a) All values refer to an oxygen content in the exhaust gas of 11% and dry basis. (b) The VOCs emission limit include methane as biogas is adopted as fuel in the combustion process. (c) Date with HF exceedance (number of exceedance on that day) was identified on 15(1) January 2025. |
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No monthly odour patrol was required to be conducted for this reporting period.
Environmental mitigation measures (related to air quality, water quality, waste, land contamination, hazard-to-life, and landscape and visual) to be implemented during the operation phase of the Project are recommended in the approved EIA Report and EM&A Manual. Monthly site audits for December 2024 to February 2025 have been carried out to check the implementation of these mitigation measures. Follow-up actions resulting from the site audits were generally taken as reported by the Contractor. The Contractor has implemented environmental mitigation measures recommended in the approved EIA Report and EM&A Manual.
The monthly inspections of the landscape and visual mitigation measures for the operation phase of the Project were performed on 17 December 2024, 24 January 2025 and 21 February 2025, and no non-compliance in relation to the landscape and visual mitigation measures were identified.
Wastes generated from the operation of the Project include chemical waste, wastes generated from pre-treatment process and general refuse. The quantities of different types of waste generated from the operation of the Project in the reporting period are summarised in Table 2.7.
Table 2.7 Quantities of Waste Generated from the Operation of the Project
|
Month / Year |
Chemical Waste |
Waste Generated from |
General Refuse |
||
|
|
Disposal of at CWTC |
Disposed of at Landfill (a) |
Recycled (b) |
Disposed of at Landfill (a) (e) |
Recycled (c) |
|
December 2024 |
1,020 L (d) |
1,246.81 tonnes |
0 tonnes |
2.765 tonnes (e) |
0.045 tonnes |
|
January 2025 |
0 L (d) |
1,267.22 tonnes |
0 tonnes |
2.650 tonnes (e) |
0.055 tonnes |
|
February 2025 |
2,297 L (d) |
1,143.59 tonnes |
0 tonnes |
2.765 tonnes (e) |
0.039 tonnes |
|
Notes: (a) Waste generated from pre-treatment process and general refuse other than chemical waste and recyclables were disposed of at NENT landfill by sub-contractors. (b) Among waste generated from pre-treatment process, no metals, papers/ cardboard packing or plastics were sent to recyclers for recycling during the reporting period. (c) Among general refuse, 0 tonnes of metals, 0.112 tonnes of papers/ cardboard packing and 0.027 tonnes of plastics were sent to recyclers for recycling during the reporting period. (d) 1,020 L of chemical waste (1,000 L of spent lube oil and 20 L of spent acid) were disposed of at CWTC in December 2024, no chemical waste was disposed of at CWTC in January 2025 and 3400 kg of chemical waste was disposed of at CWTC in February 2025, for unit consistency, it has been converted to litre based on 1.48 g/cm3 conversion factor. (e) It was assumed that four 240-litre bins filled with 80% of general refuse were collected at each collection. The general refuse density was assumed to be around 0.15 kg/L. |
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